Learn more about concrete.
https://www.baseconcrete.co.uk/different-types-of-concrete-grades-and-their-uses/

Warming and cooling in non temp controlled buildings will develop moisture.
Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!